Electrical deposition of particles from gases



L. LODGE.

ELECTRICAL DEPOSITION 0F PARTICLES FROM GASES.

APPLICATION FILED MAY 10, 1920.

1,345,790., P nt d July 6., 1920..

4 SHEETS-SHEET l.

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L. LODGE.

ELECTRICAL DEPOSITION 0F PARTICLES FROM GASES.

APPLICATION FILED MAY I0. 1920.

Patented July 6, 1920..

4 SHEETSSHEET 2.

L. LODGE.

ELECTRICAL DEPOSITION OF PARTICLES FROM GASES.

APPLICATION FILED MAY I0, 1920.

Patented July 6,

T T ll L. LODGE.

ELECTRICAL DEPOSITION OF PARTICLES FROM GASES.

APPLICATION FILED MAY I0, I920.

1,345,790. Patented July 6, 1920..

4 SHEETSSHEET 4.

Mvmmmm .lilkmdym fly 'M FUNITED STATES OFFICE.

LIONEI: LODGE, OF-BIRMINGHAM, ENGLAND, ASSIGNOR TO THE LODGE FUMECOMPANY, LIMITED, 0F BIRMINGHAM, ENGLAND.

ELECTRICAL DEPOSITION OF PARTICLES FROM GASES.

Application filed May 10v 1920.

To all whom it may concern Be it known that I, IJIONELIIJODGIC, a subjcct of the Kingof Great Britain and Ircland, residing at Great Charlesstreet, in the city of Birmingham, England, have invented certain newand useful Improvements Relating to the Electrical Deposition ofFarticles from (iases, of which the following is a specification.

This invention relates to the electrical deposition of solid or liquidparticles from gases. and has for its object to construct improveddepositing chambers of the type in which discharge electrodes arearranged between parallel metal plates.

Referring to the accompanying sheets of explanatory drawings Figures 1to l illustrate diagrammaticallyin plan portions of four different fumedeposit chambers constructed in accordance with this invention.

Figs. 5 and b are respectively plan and side elevation showing means forsupporting the upper ends of the tubes used in the structure shown inFig. 4, and Figs. 7, and 8 are plan and cross section of" means forsupporting the lower ends of the said tubes.

Fig. 9 is a diagranmatic side elevation of one of the dischargingelectrodes.

Referring to Fig. l, the channels along which the ga es How areconstructed from plates a. Instead of forming the walls of each channelfrom continuous plates, each all is preferably constructed from a numberoi narrow plates a, having their adjacent edges bent as indicated at b,and intervening bars or rods 0. he surface of the walls is thus brokenor interrupted by a number of vertical ridges which assist in arrestingthe particles carried by the gases. Between the walls are arrangedvertical deflectors d made from angle iron, and between the deflectors(Z are arranged the discharge electrodes 6. The members 01 serve todeflect the gases toward the sides of the channels when passing theelectrodes, and thus both diminish the tendency of the particles toaccumulate on the electrodes and facilitate the deposition of theparticles on the sides of the channels.

Referring to Fig. 2, the walls of the channels are formed from plates (4which overlap at their adjacent edges, and the said edges are supportedbetween pairs of vertical Specification of Letters Patent.

atented July 6, 1920.

Serial No. 380,340.

tubes 7'. Between the walls are arranged deflectors l and dischargeelectrodes 6 as described in connection with Fig. l.

Referring to Fig. ii. the gas channels are iormed by vertical plates aspaced at suitable distances apart and with the plates of one rowopposite the spaces ot the adjacent rows. The electrodes c are situatedin the spaces between the adjacent edges of the plates. Each plate isheaded or bent over into a cylindrical or open tubular form along eachvertical edge. In this construction the plates perform the doublefunction of forming the, walls of the channels and serving as thedeflectors for shielding the electrodes. By means of the beaded edgesthe gases are deflected laterally away from the electrodes. and suchedges provide also the ridges for arresting the particles.

The construction shown in Fig. 4 is essentially the same as thatillustrated by Fig. 3, but instead of beading the edges of the platesthe edges of the latter are inclosed by openjointed tubes g oftriangular or other section, the edges of the plates being slipped intothe slots formedv by the open joints of the tubes.

In all cases the various plates and other members are supported at theirupper and lower ends by means which permit free expansive movements. Forexample the members a and g of the structure shown in Fig. 4- aresupported by means such as those shown in Figs. 5 to 8. At their upperends each transverse row of tubes y is supported by a lattice bar. F 5and (3, formed by a channel bar it containing bent strips 5.

The spaces formed by the said strips i receive the upper ends of thetubes 9 which project above the plates. The ends of the channel bar aresupported in any convenient manner. At their lower ends the tubes reston the flanges of a transverse bar (Figs. 7 and 8) and are retained inthe proper positions by clips Z The lower ends of the plates rest on theupper edge of the web of the bar.

The electrodes are separately carried on insulating supports and hightension current is supplied to the electrodes by any convenient means.As shown in Fig. 9. each electrode is preferably constructed from avertical tube 0 having discharge points 7 provided thereon.

Any convenient provision maybe made for vibrating the plates and shakingdown the :u-culnulated deposits.

Having thus described my invention what 1 claim as new and desire tosecure by Letters Patent is l.'In chambers for use in the electricaldeposition of particles from gases, the combination comprising platesforming channels for the gases, discharge electrodes situatcdtransversely and longitudinally between the plates, and deflectors fordeflecting the gases toward the sides of the channels when passinglongitudinally by the discharge electrodes, substantially as described.

52. In chambers for use in the electrical deposition of particles fromgases, the combination comprising plates forming channels for the gases,discharge electrodes situated between the plates, deflectors fordeflecting the gases toward the sides of the channels when passing theelectrodes, and vertical ridges on the sides of the channels,substantially as described.

3. In chambers for use in'the electrical deposition of particles fromgases, the combination comprising vertical plates arranged in rows withspaces between their adjacent edges, and with the plates in each rowopposite the spaces in the adjacent bination comprising vertical platesar-' ranged in rows with spaces between their adjacent edges and withthe plates in each row opposite the spaces in the adjacent rows,discharge electrodes situated in the said spaces, and separate tubulardeflectors on the edges of the plates adjacent the electrodes,substantially as described.

5. In chambers for use in the electrical deposition of particles fromgases, the combination comprising vertical plates arranged in rows withspaces between their adjacent edges and With the plates in each rowopposite the spaces in the adjacent row, discharge electrodes situatedin the said spaces, separate tubular deflectors on the edges of theplates adjacent the electrodes, a flanged support for the lower ends ofthe plates and deflectors, and a lattice like support for the upper endsof the deflectors, substantially as described.

In testimony whereof I have signed my name to this specification.

LIONEL LODGE.

